#include "stdio.h"
#include "stdint.h"

uint64_t factorial(int n) {
    if (n == 0 || n == 1)
        return 1;
    else
        return n * factorial(n - 1);
}

uint64_t sqsq(int n) {
    uint64_t res = 1;
    for (size_t i = 0; i < n; i++)
    {
        res *= n;
    }
    return res;
}

int main() {
    double res = 0.0f;
    for (size_t i = 1; i < 20; i++)
    {
        res = factorial(i)/ (double)sqsq(i);
        // printf("[%d]%f\n", i, res);
        printf("%f\n", res);
    }
    
    getchar();
    return 0;
}